CustomLegend.qml Example File | Qt Charts 5.12.11

- Qt 5.12
- Qt Charts
- Qml Custom Legend
- CustomLegend.qml Example File
- Qt Charts | Commercial or GPLv3

# CustomLegend.qml Example File

qmlcustomlegend/qml/qmlcustomlegend/CustomLegend.qml

     /****************************************************************************
     **
     ** Copyright (C) 2016 The Qt Company Ltd.
     ** Contact: https://www.qt.io/licensing/
     **
     ** This file is part of the Qt Charts module of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:GPL$
     ** Commercial License Usage
     ** Licensees holding valid commercial Qt licenses may use this file in
     ** accordance with the commercial license agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
     ** a written agreement between you and The Qt Company. For licensing terms
     ** and conditions see https://www.qt.io/terms-conditions. For further
     ** information use the contact form at https://www.qt.io/contact-us.
     **
     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3 or (at your option) any later version
     ** approved by the KDE Free Qt Foundation. The licenses are as published by
     ** the Free Software Foundation and appearing in the file LICENSE.GPL3
     ** included in the packaging of this file. Please review the following
     ** information to ensure the GNU General Public License requirements will
     ** be met: https://www.gnu.org/licenses/gpl-3.0.html.
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     import QtQuick 2.0
     import QtCharts 2.0

     Rectangle {
         id: legend
         color: "lightgray"

         property int seriesCount: 0
         property variant seriesNames: []
         property variant seriesColors: []
         signal entered(string seriesName)
         signal exited(string seriesName)
         signal selected(string seriesName)

         function addSeries(seriesName, color) {
             var names = seriesNames;
             names[seriesCount] = seriesName;
             seriesNames = names;

             var colors = seriesColors;
             colors[seriesCount] = color;
             seriesColors = colors;

             seriesCount++;
         }

         Gradient {
             id: buttonGradient
             GradientStop { position: 0.0; color: "#F0F0F0" }
             GradientStop { position: 1.0; color: "#A0A0A0" }
         }

         Gradient {
             id: buttonGradientHovered
             GradientStop { position: 0.0; color: "#FFFFFF" }
             GradientStop { position: 1.0; color: "#B0B0B0" }
         }

         Component {
             id: legendDelegate
             Rectangle {
                 id: rect
                 property string name: seriesNames[index]
                 property color markerColor: seriesColors[index]
                 gradient: buttonGradient
                 border.color: "#A0A0A0"
                 border.width: 1
                 radius: 4

                 implicitWidth: label.implicitWidth + marker.implicitWidth + 30
                 implicitHeight: label.implicitHeight + marker.implicitHeight + 10

                 Row {
                     id: row
                     spacing: 5
                     anchors.verticalCenter: parent.verticalCenter
                     anchors.left: parent.left
                     anchors.leftMargin: 5
                     Rectangle {
                         id: marker
                         anchors.verticalCenter: parent.verticalCenter
                         color: markerColor
                         opacity: 0.3
                         radius: 4
                         width: 12
                         height: 10
                     }
                     Text {
                         id: label
                         anchors.verticalCenter: parent.verticalCenter
                         anchors.verticalCenterOffset: -1
                         text: name
                     }
                 }

                 MouseArea {
                     id: mouseArea
                     anchors.fill: parent
                     hoverEnabled: true
                     onEntered: {
                         rect.gradient = buttonGradientHovered;
                         legend.entered(label.text);
                     }
                     onExited: {
                         rect.gradient = buttonGradient;
                         legend.exited(label.text);
                         marker.opacity = 0.3;
                         marker.height = 10;
                     }
                     onClicked: {
                         legend.selected(label.text);
                         marker.opacity = 1.0;
                         marker.height = 12;
                     }
                 }
             }
         }

         Row {
             id: legendRow
             anchors.centerIn: parent
             spacing: 10

             Repeater {
                 id: legendRepeater
                 model: seriesCount
                 delegate: legendDelegate
             }
         }
     }